12.6 Identifying Ring Systems

The OEChem function OEDetermineRingSystems behaves very similarly to the OEDetermineComponents function described in the previous section. However, this function returns a mapping from atom indices to a ring system index denoting a ring system, or "component" connected only by ring bonds. This function requires that OEFindRingAtomsAndBonds has called previously. All acyclic atoms are mapped to the value zero.